Ma Long's current grip change from forehand to backhand, while easy to execute, is now fairly significant.
Sorry if I'm a bit slow (too much work lately, but my passion for the sport makes me sneak some time in here). I am particularly interested in Ma Long's grip change you mention. Is there a link that shows how he does it?
I remember somewhere he explained how normally people use the thumb to support for backhand, and switch between forehand and backhand by loosening the grip between strokes. On the other hand, he does not raise his thumb for his backhand stroke in order to facilitate quick switching between forehand and backhand, and he uses a backhand-centric forehand grip with little or no change between strokes. His only grip change is between service and after service, which he explained happens quickly and naturally after years of training. Has he changed his grip style?